(A) 6
(B) 2
(C) 9
(D) ** 8
EXPLANATIONS BELOW
Concept note-1: -On November 4, 2008, Obama defeated the Republican nominee, Senator John McCain of Arizona, making him the President-elect and the first African American elected President. He was the third sitting U.S. Senator, after Warren G. Harding and John F. Kennedy, to be elected president.
Concept note-2: -When Barack Obama was elected president in 2008, he became the first African American to hold the office.